Neuropsychological performance, magnetic resonance imaging (MRI) and electr
oencephalography (EEG) were investigated in 12 consecutive patients with ve
ry mild traumatic brain injury (MTBI) (Glasgow coma score 15) within 24 hou
rs and 6 weeks after injury. The data were compared to 14 control subjects.
There was a significant impairment in neuropsychological performance (verb
al memory, arithmetic abilities and psychomotor reaction time) at onset and
after 6 weeks, whereas verbal fluency and non-verbal memory lest revealed
no significant differences matching the control values. In MRI scans, three
patients showed traumatic lesions (slight epidural haematoma, haemorrhagic
contusions and white matter lesions indicating diffuse axonal injury). In
the EEG recordings, no generalized slowing or focal changes were found. Str
uctural and functional impairment can be identified using neuroimaging and
neuropsychological examination, even in very MTBI patients.